Contaminated water: In a sample of 41 water specimens taken from a construction site, 26 contained detectable levels of lead. (a) Construct a 98% confidence interval for the proportion of water specimens that contain detectable levels of lead. Round the answer to at least three decimal places. (b) Construct a 90% confidence interval for the proportion of water specimens that contain detectable levels of lead. Round the answer to at least three decimal places. (c) What is the effect of increasing the level of confidence on the width of the interval? Part 1 of 3 (a) Construct a 98% confidence interval for the proportion of water specimens that contain detectable levels of lead. Round the answer to at least three decimal places. A 98% confidence interval for the proportion of water specimens that contain detectable levels of lead is

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